Machine for stripping sheet metal



Feb. 19, 1952 J. B. PICTON MACHINE FOR STRIPPING SHEET METAL 4Sheets-Sheet 1 Filed July 27, 1950 INVE TQR: w m

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Feb. 19, 1952 J. B. PICTON MACHINE FOR STRIPPING SHEET METAL Filed July27, 1950 4 Sheets-Sheet 2 INVENTQ? P T.

9 J. B. PICTON 2,586,376

MACHINE FOR STRIPPING SHEET METAL Filed July 27, 1950 4 Shegts-Sheet 52x0 He's. 3%

J. B. PICTON MACHINE FOR STRIPPING SHEET METAL Feb. 19, 1952 4Sheets-Sheet 4 Filed July 27, 1950 S 42 e n 6 Arryir Patented Feb. 19,1952 UNITED STATES OFFICE? MACHINETFOR. STRIPPINGQSHEETv METAL.- v

J ohn Bu'rlcy Picton," Wolverhampton; England,"

assignor to Jo'shua Bigwoodi z SGmLimited,

Wolverhampton, England, a British company";

Application July 27,1950, SeriaJlNo. 176,096 In Great Britain July30.'i194.r

15. Claims;

transport and storage. 1. In particular the inven-- tion :relatesto.winding machine's having a rotarydriven winding drum and in operativeassociation therewithxsan unloadersxlevice for removing :the coiledshect-metal-from'the drum in an'axial directionsupon completion of'ithccoiling process.-

Such machineswill hereinafter be referred to-as Winding machines: of thekind specified.

Inxwindingrmachines of the kind specified as hitherto constructed thedrum is provided with a longitudinal slot extending across its sheetengaging face inan axial direction forthe -pur--- pose of receiving the:leading end of the sheet so that: at. the commencement of winding-thedrum may effect a purchaseaonthe former;

It is sometimes found diflicult to remove the completed coil from thedrum because the stressed conditionrof the materialof' the'coil' causesthe endWhich-is received :in thehslotrto bind against 1 the wallsthereof.

The object of the; present'invention isto pro vide an improved"construction with a view to eliminating :or reducin'gthis tendency.

With this object in "view "a winding-:machine of the-kindspecifiedconstructed inaccordance with the present invention-:has a winding "drumwhich isprovided with a guideway extending lon gitudinallywith respectto the axis of rotation of---' the drum, saidguideway carrying orbeingadapted .to carry a slide movable endwisealong and out of the .guidewayand said slide having an open-v.

wise-out" of the 'guideway concurrently with unloading of the, coiledsheet off the drum Sin'ce'the slide is designed for "free; endwisemovement along the-guideway at the appropriate time any binding oftheend -of:thesheet in the:

slide will notinhibitunloading and; the; s1ide;can be removed from thesheet. after :theyunloadinge. process,. the provision of: more than. oneslide:

enablingtsubstantially, continuous useto be made.

of the winding machine.

Whilst applicablegenerally, as for instance fore windingfla single sheet.of. meta1 .through a pre- 2. treatment apparatus 1 and into coiled form--on the drumtheprimaryand most advantageous applicationoftheinventionis to-Windingmachines of the--kindspecified for use incoiling simulta neously and in side-by-side relationship on a commondrum'a plurality of strips of sheet metal. I For'instancewthe metalmayinitially be in the form ofa single sheet and-the pre-treatment ap--paratus may comprise a slitting machine, the cutters or slitting toolsof which cut-thesingld sheet into a plurality of --side-.b5' -siclestripsas the winding machine draws the sheet therethrough'.Alternatively, as another -example,- a plurality'of side-bY-side stripsmay'requi-reto be subjectedto achemical-pre-treatment process in anapparatus through which they require to be drawn; In suchi cases, it hasbeen found 'in practice that with conventionaL-winding-machines of thekind specified I the inner 1 ends of adjacent coiled strips of sheetmetal-tendto bemoved into' overlapping relationship during the unloadingproc essthus accentuating any possible binding or jamming- 0ftliese ends-in the slot in the winding drum or '=causing =-unwindingofthe. innerturns of the coils;

This tendency is entirely' obviated-nr reduced to a very great extent by'use==of-- a windingmachine constructed in accordance with theinvention;

The invention will now be described with ref erence :to the accompanyingdrawings; wherein Figure l shows a general arrangement of 'a windingmachine constructed in-accordance with, the-invention as seen :in'plan;-

Figure 2 isa fragmentary view of the 'wind- I ing :drum seenin endelevation;

Figure '3' isa further fragmentary view-showingthewindihg drum insideele'vation; the upper part of the drum-andthe pusher plate beingshown in cross section."

means forrusewithza winding .drum as illustrated; I in Figure 3.

Figure -6--is-a vvie,w. of the construction of slide" shown in,FigureBin cross-esectiononthe =-line 6-6 ofFigure 5.

Figure 7 Tis. .afragmentary viewwshowing; in ende elevation and incrossasectionone-the line -'|-'l 3 (Figure 8) another construction andFigure 8 is a further fragmentary view of the construction shown inFigure 7 in side elevation and in cross section on the line 88 of Figure7.

As seen in Figure 1, the machine comprises a winding drum I driventhrough a shaft H and a reduction gear box 12 from an electric drivingmotor [3 all of which are supported upon a suitable bed structure l4. Atthe rearward end of the winding drum I0 is provided an unloader devicel5 for displacing in an axial direction forwardly of the forward end ofthe drum, the coil or coils of sheet or strip metal wound thereon oncompletion of winding operations.

In addition to these parts and at a position spaced radially outwardlyfrom the surface of the drum there is provided a coil gripping andholding device It, the function of which is to support finished coilsduring and after their removal from the drum to permit these coils to bebound with wire and thus secured against uncoiling, during which processthe winding drum can be employed for coiling fresh sheet or stripmaterial. The device is is described and claimed in my co-pendingapplication Numbered 172,101, entitled improvements relating to machinesfor slitting and coiling sheet metal, and filed on July 5, 1950, nowpatent No. 2,579,700, dated December 25, 1951, and will not therefore befurther described in the present specification.

The machine illustrated in Figure l is intended primarily for winchingand coiling a sheet of metal subjected to pre-treatment in a slittingmachine so that in fact after the metal has been drawn by the windingmachine through the slitting machine it is in the form of a plurality ofstrips of sheet metal lying side by side.

Whilst this is the primary and intended use of the machine it iscontemplated that it may be put to other uses, for example, drawing oneor more strips of sheet metal and in the latter case, these strips lyingside by side through another form of pre-treatment apparatus, forexample, a chemical apparatus in which is carried out one step of afinishing process.

In the illustration shown in Figure l the winding drum I0 is indicatedgenerally and may be of either of a number of alternative forms, one ofwhich is illustrated in Figures 2 and 3 and another of which isillustrated in Figures 7 and 8.

Referring firstly to the construction shown in Figures 2 and 3, thewinding drum is a cylindrical structure, the cylindrical wall I! ofwhich has formed therein a guideway l8, of which the side walls [9diverge from each other in a direction towards the central region of thedrum, the base 20 of the guideway 18 being fiat and parallel to atangent to the circumference of the drum at the mid-point of theguideway.

The guideway extends across the whole length of the circumferentialsurface of the drum and is open at the forward end of the drum.

Mounted in the guideway is a slide having a body 2| of elongated formand of cross-sectional shape conforming to that of the guideway so thatthe slide is free to move endwise along the guideway and can, whenrequired, be completely expelled from the guideway through the open endthereof.

For this purpose the slide is provided with a radially projecting head22 formed on an end plate or member 23 secured in any suitable manner tothe body of the slide as, for instance, by means of countersunk screws24.

of winding drum 4 Extending the length of the body is a sheet receivingopening or slot 25, the term sheet receiving opening being used in thegeneric sense and including the case where the sheet material is in therelatively narrow form of a single strip or a plurality of stripsarranged side-by-side as when the winding machine is used in conjunctionwith the slitting machine.

This slot or opening 25 extends inwardly towards the central region ofthe drum but instead of extending in the true radial direction istangential to a small diameter pitch circle concentric with the axis ofrotation of the drum.

The sense of the inclination of the slot or opening with respect to thetrue radial direction is such that the slot or opening forms an acuteangle with the circumferential face of the drum seen generally at 26, onthe leading side of the slot, (having regard to the direction ofrotation of the drum indicated by the arrow (Figure 2)) and an obtuseangle on the trailing side of the slot or opening. By inclining the slotor opening in this manner the insertion of the leading end of the sheetmaterial is facilitated and after the drum has rotated through acomparatively small angle an adequate purchase is obtained against thesheet material by reason of the bending of the sheet material as seen inFigures 2 and 4.

In the form of slide illustrated in Figure 4, the body of the slide isof one piece construction and of a rigid character, the thickness of theslot or opening 25 being only just greater than the thickness of thesheet material required to be received in the slot or opening in orderthat the purchase already referred to may be readily effected.

After a single revolution of the drum upon commencement of winding, thesecond turn of the coil so formed will bear inwardly against thatportion of the sheet material received in the slot or opening and willanchor same firmly in position.

Preferably and as shown in Figure 4, the guideway is accommodated whollybeneath the circumferential surface of the drum and the outer face ofthe body of the slide as seen at 21, is of curved form having a radiusof curvature equal to that of the drum so as to form a continuation ofthe surface thereof and lie flush with same.

In an alternative form of slide intended for use with a guideway ofrigid character as illustrated in Figures 2 and 3, is shown in Figures 5and 6, the body of the slide here being of two part construction as seenat 28 and 29, these two parts forming side members secured together bybolts, 9 and having opposed parallel walls 30 and 3| defining the sheetreceiving slot or opening 32.

The side member 29 is further provided with locking means for retainingthe sheet material frictionally in the slot or opening 32, comprising aspindle 33 having keyed or otherwise fixed thereto a plurality ofgripping cams 34, portions of which project, as seen in Figure 6, intothe slot or opening 32 so as to bear against one face of the sheetmaterial received therein. The end of the spindle 33 is squared as at 35to enable a suitable removable key or handle having a squared socket tobe engaged therewith for the purpose of rotating the spindle and earns.

On completion of a coiling operation when it is required to move thecoil or coils formed on the drum unloader device 15, comprising anannular at the rearward end thereof moves endwise over thedrumjay meansof-hydraulic piston-and. cylin-..

der units 31; (Figure 1 .z

This plate pushes: against: the sides of-the-.coi1s-.. propenand the:plate .is provided at, its inner edge withaa backwardly setfiange-member38 having, a block orfacing .39 positionedto engage througha slotiinitheplate with a rearward- :face of :;the

36 are: operative.simultaneouslyrand the :mainportionpf thecoilsor.coils is thus moved. simultaneously: togetherwith the slide.inranaaxial; direc-W tionalong and off the-drum;-

lnlthegconstruction. of drum-shown .in. Figured? and .8. themdrumisagain of hollow cylindrical'formation butinsteadeof. the guideway beingrigid,

thcwallof the; drum includes two :portions M. and

42 pivotally, connected together by a pintle 43 ex-1 tending parallelvtothe .axis ofrotationzof the drum and spaced inwardly: of said wall.

The.;guide,way is formed. partly in the portion 42 ;and,.:par,tly in the.prtion4l,' ivotal. movement;; of those portions relativelyto each otherresultingzgin movement of the inwardly diverging walls; 44, and;45 ofthe guidewaytowards or away from ;each V-other. depending upon thedirection of sueh pivotaltmoyement; The width ofthe guideway-is. thus;contracted .or expanded.

For;= employment-with:this -,.construction .of

drum; the; slide 1comprises,-two; side .members 46:

andjl; engaged withgthe opposite walls44. and 45, of the guidewayrespectively and with base portions of the guideway formed respectivelyin the portions--44 and 42.. of the drum wall, the inner facesof theseside: members, being spaced apart' anddefining a sheet receivingslotoropening 48. The side membersAGand 4! of the slide are movable towardsand ,away from eachother in response to-thepressure exerted by the sidewalls 44 and 45 of, theguideway and whena sheet or strip isreceived intheslot,;48 such inward pres-,

sure serves both to grip; the sheetvfrictionally in .1

the, slot andto clamp the slide in the guideway.

For effecting relative pivotal movement of; the portions 4| and 42: anysuitable mechanism mayv be provided foryexample, the drum wallmayinelude a ,further pivotal portion 50 having at one longitudinaledgea facingmember 5| engaging a co-oper,ating .facingmember 52 on theportion 42, the engaging faces of these members being inclinfid-tothecircumferential face of the drum so that pivotal movementof the portion 50 transmits ivctalmovementto the portion 42.

Movementof the, portion 50 about its mounting pintle 53 is controlled bya screw andnut gear of whichtheiscrewis seen at 54 and is pivotallyconnected to theportion 50 and of which the nut 55 is 'journalled in abearing block 56 secured to the portion 41 and rotatable by means ofbevel gearing 51-.

Two screws 54 are provided spaced axially apart and likewise two sets ofbevel gearin 51, the driving Jewels of which are mounted on a commonoperating shaft 58'projecting from the forward endof, the drum, andsquared for engagement with a squared socket on a removable key orhandle,

The ,portion 42 ismaintained with its facing member. 52 in contact withthe facing member 5! by means Of acoiled tension spring 60 anchored:

at one end as indicated at 6| to the portion 41.

and at the otherend to, ailweb, 62 "on-the. portion 42.

Although not shown in thedrawings. the wind-s ing drum shownin-Figures-l to..5 may and prefer ably does incorporateaconventionalcollapsing 1-, flapsuch as the member'til seen in Figure -7in::. order to free the inner turn of a coil to facilitate unloading. Ifdesired,,two.flaps, suchas 50 and; 42, may be incorporated, the latterhowever .not:-;

including any portion of the guideway.

What I claim then is 1. In a winding. *machine; a rotary winding drum;means for rotatingsame, said drum having a guideway extendinglongitudinally with respectf to the axis of rotation of the drum; aslide in said... guideway mounted for; endwise expulsion there from,said slide. having an open 'mouthed sheet. receiving openingextendinglengthwise in rela tion to said guideway and inwardly towardsthe--central region of the drum to form an anchoragefor the leading end ofthe sheet; and, an unloader device including a member movable axially-inrelation to the drum and engageable with said slide to expel sameendwise from the guideway.

2.'In a winding machine; a rotary-winding drum; means'for rotating same;said drumhaving an open ended guideway positioned beneath the surface ofthe drum and extending -longitudi-- nally with respect to the axis ofrotation of the wardly towards the central region of the drum to form ananchorage for the leading end of the sheet; and, an'unloader deviceincluding a member movable axially in relation'to the drum andengageable with said slide to expel same endwise from the guideway.

drum; means for rotating same; said drum having an open ended guidewayhaving side walls diverging from each'other in the inward directiontowards the central region of the drum, said guideway being positionedbeneath the surface of sheet receiving opening extending lengthwise inrelation to said guideway'and inwardly towards the central region of-the drum to form an an' chorage for theleading end of the sheet; and anunloader device including ;a member movable axially in'relation to thedrum and engageable with said'slide to expel same endwise from theguideway.

4. In a winding-machine; a rotary winding drum; Vmeans forrotating same;said drum hav- .ing an open ended guideway extending longitudinally withrespect to the axis of rotation of the 3. In a winding machine;- arotary winding--- drums; saidguideway having side walls movablerelatively towards and away from each other; a slide in said, guidewaymounted for endwise ex-. pulsiontherefrom, said slide having an openreceiving opening extending gageable' with said slide" to expel sameendwise from theguideway 5. In a winding machine; a hollow rotarywinding drum of generally cylindrical formation; means for rotatingsame; the cylindrical wall of the drum including at least two portionspivotally connected together about an axis parallel to the axis of thedrum and spaced inwardly of said wall, a guideway formed partly in oneof said portions and partly in the other, said guideway extendinglongitudinally with respect to the axis of rotation of the drum; andhaving opposed side walls movable towards and away from each otherduring pivotal movement of one of said portions relatively to the other;a slide in said guideway mounted for endwise expulsion therefrom, saidslide having an open mouthed sheet receiving opening extendinglengthwise in relation to said guideway and inwardly towards the centralregion of the drum to form an anchorage for the leading end of thesheet; means on said drum for controllably moving one of said drum wallportions relatively to the other about their common pivotal axis toclamp or release said slide; and an unloader device including a membermovable axially in relation to the drum and engageable with said slideto expel same endwise from the guideway.

6. In a winding machine; a hollow rotary winding drum of generallycylindrical formation; means for rotating same; the cylindrical wall ofthe drum including two portions pivotally con-. nected together about anaxis parallel to the axis of the drum and spaced inwardly of said wall;a guideway formed partly in one of said portions and partly in theother, said guideway extending longitudinally with respect to the axisof rotation of the drum and having opposed side walls movable towardsand away from each other during pivotal movement of one of said portionsrelatively to the other; a slide in said guideway mounted for endwiseexpulsion therefrom, said slide having an open mouthed sheet receivingopening extending lengthwise in relation to said guideway and inwardlytowards the central region of the drum to form an anchorage for theleading end of the sheet; said drum wall having a third portionpivotally connected adjacent one longitudinal edge to one of the firstsaid portions about an axis parallel to the axis of the drum and spacedinwardly of said wall, and having at its other longitudinal edge abearing face inclined with respect to the cylindrical face of the drumand engaging a co-operating face on the other of the first saidportions, controlling mechanism housed in said drum for moving saidthird portion angularly about its pivotal axis to effect relativesliding of said co-operating faces and movement of said opposed guidewalls towards and away from each other, said controlling mechanismincluding an operating member positioned and accessible externally ofthe drum; and an unloa'der device including a member movable axially inrelation to the drum and engageable with said slide to expel sameendwise from th guideway.

7. In a winding machine; a hollow rotary winding drum of generallycylindrical formation; means for rotating same; the cylindrical wall ofthe drum including at least two portions pivotally connected togetherabout an axis parallel to the axis of the drum and spaced inwardly ofsaid wall, a guideway formed partly in one of said portions and partlyin the other, said guideway extending longitudinally with respect to theaxis of rotation of the drum, and having opposed side walls movabletowards and away from each other during pivotal movement of one of saidportions relatively to the other; a slide in said guideway mounted forendwise expulsion therefrom, said slide having an open mouthed sheetreceivin opening extending lengthwise in relation to said guideway andinwardly towards the central region of the drum to form an anchorage forthe leading end of the sheet; controlling mechanism housed in said drumincluding a member movable towards and away from the centre of the drumand engaging one of said portions to efiect pivotal movement thereofrelatively to the other portion, a rotary spindle journalled in bearingsfixed to said other portion, and a screw and nut reduction gearoperatively interposed between said spindle and said member; and, anunloader device including a member movable axially in relation to thedrum and engageable with said slide to expel same endwise from theguideway.

8. In a winding machine; a rotary winding drum; means for rotating same;said drum having a guideway extending longitudinally with respect to theaxis of rotation of the drum; a slide mounted in said guideway having anelongated body housed in the guideway and slidable endwise therein, saidbody having an open mouthed sheet receiving opening extending lengthwisein relation to said guideway and inwardlytowards the central region ofthe drum to form an anchorage for the leading end of the sheet; and saidslide having a head projecting outwardly from the mouth of saidguideway, and an unloader device including a member movable axially inrelation to the drum and engageable with said head to expel the slideendwise from the guideway.

9. In a Winding machine; a rotary winding drum; means for rotating same;said drum having a guideway extending longitudinally with respect to theaxis of rotation of the drum; a slide mounted in said guideway having anelongated body housed in the guideway and slidable endwise therein, saidbody having a narrow sheet receiving slot of width only just greaterthan the thickness of the sheets which it is required to handle, saidslot extending lengthwise in relation to said guideway and inwardlytowards the central region of the drum in a direction tangential to apitch circle concentric with the axis of rotation of the drum but ofsmaller diameter, so that, having regard to the direction of rotation ofthe drum, the slot walls and the outer face of the drum form an acuteangle on the leading side of the slot and an obtuse angle on thetrailing side; and, an unloader device including a member movableaxially in relation to the drum and engageable with said slide to expelsame endwise from the guideway.

10. In a winding machine; a rotary winding drum; means for rotatingsame; said drum having a guideway extending longitudinally with respectto the axis of rotation of the drum; a slide mounted in said guidewayhaving an elongated body housed in the guideway and slidable endwisetherein, said body having an open mouthed sheet receiving openingextending lengthwise in relation to said guideway and inwardly towardsthe central region of the drum; locking means on said body including amovable member positioned to engage with one face of the portion of asheet in the opening and retain same therein; and, an unloader deviceincluding a member movable axially in relation to the drum andengageable with said slide to expel same endwise from the guideway 11.In a winding machine; a rotary winding drum; means for rotating same;said drum having a guideway extending longitudinally with respect to theaxis of rotation of the drum; a slide mounted in said guideway having anelongated body housed in the guideway and slidable endwise therein, saidbody having an open mouthed sheet receiving opening and a spindlejournalled' in and extending lengthwise along the body and the centralregion of the drum, said guideway being positioned beneath the surfaceof the drum and extending longitudinally with respect to the axis ofrotation of the drum; a slide mounted in said guideway having anelongated body of crossfsectional shape conforming to that defined bysaid inwardly diverging walls of the guideway and slidable endwisetherein, said body having an" open mouthed sheet receiving openingextending lengthwise in relation to said guideway and in-' wardlytowards the central region of the drum to form an anchorage for theleading end of the sheet; and, an unloader device including a membermovable axially in relation to the drum and engageable with said slideto expel same end wise from the guideway. 13. In a winding machine; arotary winding drum; means for rotating same; said drum having an openended guideway extending longitudinally with respect to the axis ofrotation of the; drum; said guideway having side walls movablerelatively towards and away from each other; a

slide mounted in said guideway having an clon gated body housed in theguideway and slidable endwise therein, said body including relativelymovable side members spaced apart to definean open mouthed sheetreceiving opening extending lengthwise in relation to said guideway andinwardly towards the central region of the drum to form an anchorage forthe leading end of the sheet; said side members engaging the movableWalls of the guideway means onsaid drumfor' adjusting the relativeposition of said walls'to clamp or release the slide in or from theguideway and simultaneously to clamp or free a sheet portion received insaid opening; and, an unloader device including a member movable axiallyin relation to the drum and engageable with said slide to expel sameendwise from the guideway.

14. In a winding machine; a rotary winding drum; means for rotatingsame; said drum having a guideway extending longitudinally with respectto the axis of rotation of the drum; a slide in said guideway mountedfor endwise expulsion therefrom, said slide having an open mouthed sheetreceiving opening extending lengthwise in relation to said guideway andinwardly towards the central region of the drum to form an an-r choragefor the leading end of the sheet; and an unloader device includingmembers adapted to engage substantially simultaneously with one side ofa strip metal coil on the drum and with said slide whereby the formertogether with the slide is unloaded off the drum with the inner end ofthe coil retained in the slide.

15. In a winding machine; a rotary winding drum; means for rotatingsame; said drum having a guideway extending longitudinally with respectto the axis of rotation of the drum; a slide mounted in said guidewayhaving an elongated body housed in the guideway and slidable endwisetherein, said body having an open mouthed sheet receiving openingextending lengthwise in relation to said guideway and inwardly towardsthe central region of the drum to form an anchorage for the leading endof the sheet; and said slide having a head projecting outwardly from themouth of said guideway; and an unloader device including a pusher platehaving an opening in register with one end of the drum, means for movingsaid plate axially in relation to the drum to engage the plate with astrip metal coil thereon, said plate having a backwardly set flangeportion at its inner edge positioned to engage simultaneously with thehead of the slide.

JOHN BURLE Y PICTON.

REFERENCES CITED UNITED STATES PATENTS Name Date Leroy et al Mar. 4,1947 Number

